M. H. Small,[25] after pointing out that communal animals are more intelligent than those with solitary habits, and that even to name all the irradiations of the social instinct would be write a history of the human race, studied nearly five hundred cases of eminent men who developed proclivities to solitude. It is interesting to observe in how many of these cases this was developed in adolescence when, with the horror of mediocrity, comes introspection, apathy, irresolution, and subjectivism. The grounds of repulsion from society at this age may be disappointed hunger for praise, wounded vanity, the reaction from over-assertion, or the nursing of some high ideals, as it is slowly realized that in society the individual cannot be absolute. The motives to self-isolation may be because youth feels its lack of physical or moral force to compete with men, or they may be due to the failure of others to concede to the exactions of inordinate egotism and are directly proportional to the impulse to magnify self, or to the remoteness of common social interests from immediate personal desire or need, and inversely as the number and range of interests seen to be common and the clearness with which social relations are realized. While maturity of character needs some solitude, too much dwarfs it, and more or less of the same paralysis of association follows which is described in the nostalgia of arctic journeys, deserts, being lost in the jungle, solitary confinement, and in the interesting stories of feral men.[26] In some of these cases the mind is saved from entire stultification by pets, imaginary companions, tasks, etc. Normally "the tendency to solitude at adolescence indicates not fulness but want"; and a judicious balance between rest and work, pursuit of favorite lines, genuine sympathy, and wise companionship will generally normalize the social relation.